Fitness influencer Jen Selter is sharing some wise life advice while enjoying downtime on the beach. Selter posted pictures of herself posing in a white one-piece swimsuit against a beautiful ocean background. "Happy Friday!!! 🙌🏻 Don't listen to what people say, watch what they do," she captioned the post. How does she stay so fit? Read on to see 5 ways Selter stays in shape and the photos that prove they work—and to get beach-ready yourself, don't miss these essential 30 Best-Ever Celebrity Bathing Suit Photos!

Breakfast is Selter's favorite meal of the day, and eggs—either plain or mixed with vegetables—are always on the menu. "Eggs are rich in protein, which is more filling than either fat or carbohydrate," says registered nutritionist Jo Lewin. "As a food choice, eggs score well, being high on the satiety index, a measure of how filling a food is. In fact, studies show that an egg breakfast is more sustaining than the equivalent calorie counted carb breakfast and, what's more, may help reduce your calorie intake later in the day."

Selter allows herself two cheat meals a week to enjoy whatever she likes. Her favorite cheat meals are chicken parmesan and Penne Arrabiata. "For me and for our athletes, the mental health component is tremendous," says RevolutioniZe co-owner Michele Zandman-Frankel. "Although I don't like to call them 'cheat meals,' but more of a 'relaxed meal.' It is not a 'dirty' meal, or a chance to stuff yourself or binge. It's more of a chance to not think, lay back, and relax—and enjoy something untracked."

Selter enjoys meal-delivery salads for lunch, with ingredients such as cauliflower, tomatoes, grilled chicken, and Brussels sprouts. "A number of studies have linked the consumption of brassica vegetables with a reduced risk of type 2 diabetes," says registered nutritionist Nicola Shubrook. "This may be because brassicas, like Brussels sprouts, are rich in fiber, which helps stabilize blood sugar levels. In addition, Brussels sprouts also provide an antioxidant called alpha-lipoic acid which has been linked with improvements in insulin sensitivity."

Selter enjoys honey-glazed salmon and arugula salad for a healthy, nutrition-packed dinner. "Oily fish plays an important role in dampening the effects of inflammation, which is key to helping manage a number of chronic diseases, including diabetes and cancer," Lewin says. "Studies suggest that eating more oily fish like salmon could help lower levels of the markers that indicate inflammation."

Selter enjoys protein cookies and protein balls for a sweet yet healthy snack. "For many protein cookie products, the first ingredient is the protein blend instead of enriched flour (white flour); so you are getting off to a great start with just that," says Laura LaValle, RDN, LD. "Also, many of these products are carb and sugar-controlled, and they may have other healthy ingredients, like added fiber."